WASHINGTON (Reuters) - Israeli Prime Minister Benjamin Netanyahu warned U.S. President Barack Obama on Tuesday against accepting a nuclear deal with Iran that would be a "countdown to a potential nuclear nightmare" by a country that "will always be an enemy of America".

KIEV/DONETSK, Ukraine (Reuters) - Three Ukrainian servicemen were killed and nine wounded as pro-Russian rebels shelled government positions despite a ceasefire deal, the military said on Tuesday, announcing Kiev's highest casualty toll in several days.

GENEVA (Reuters) - A United Nations envoy called on Israel on Tuesday to investigate the killing of more than 1,500 Palestinian civilians, one third of them children, during the 2014 Gaza war, and to make the findings public.